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/*
* Copyright 2012 International Business Machines Corp.
*
* See the NOTICE file distributed with this work for additional information
* regarding copyright ownership. Licensed under the Apache License,
* Version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package javax.batch.operations;
import java.util.List;
import java.util.Set;
import java.util.Properties;
import javax.batch.runtime.JobExecution;
import javax.batch.runtime.JobInstance;
import javax.batch.runtime.StepExecution;
/**
* JobOperator provides the interface for operating on batch jobs.
* Through the JobOperator a program can start, stop, and restart jobs.
* It can additionally inspect job history, to discover what jobs
* are currently running and what jobs have previously run.
*
* The JobOperator interface imposes no security constraints. However,
* the implementer is free to limit JobOperator methods with a security
* scheme of its choice. The implementer should terminate any method
* that is limited by the security scheme with a JobSecurityException.
*
*/
public interface JobOperator {
/**
* BatchStatus enum defines the batch status values
* possible for a job.
*/
public enum BatchStatus {STARTING, STARTED, STOPPING,
STOPPED, FAILED, COMPLETED, ABANDONED }
/**
* Returns a set of all job names known to the batch runtime.
*
* @return a set of job names.
*
* @throws JobSecurityException
*/
public Set getJobNames() throws JobSecurityException;
/**
* Returns number of instances of a job with a particular name.
*
* @param jobName
* specifies the name of the job.
* @return count of instances of the named job.
* @throws NoSuchJobException
* @throws JobSecurityException
*/
public int getJobInstanceCount(String jobName) throws NoSuchJobException, JobSecurityException;
/**
* Returns all JobInstances belonging to a job with a particular name.
*
* @param jobName
* specifies the job name.
* @param start
* specifies the relative starting number to return from the
* maximal list of job instances.
* @param count
* specifies the number of job instances to return from the
* starting position of the maximal list of job instances.
* @return list of JobInstances.
* @throws NoSuchJobException
* @throws JobSecurityException
*/
public List getJobInstances(String jobName, int start, int count)
throws NoSuchJobException, JobSecurityException;
/**
* Returns execution ids for job instances with the specified
* name that have running executions.
*
* @param jobName
* specifies the job name.
* @return a list of execution ids.
* @throws NoSuchJobException
* @throws JobSecurityException
*/
public List getRunningExecutions(String jobName) throws NoSuchJobException, JobSecurityException;
/**
* Returns job parameters for a specified job instance. These are the
* key/value pairs specified when the instance was originally created
* by the start method.
*
* @param executionId
* specifies the execution from which to retrieve the
* parameters.
* @return a Properties object containing the key/value job parameter
* pairs.
* @throws NoSuchJobExecutionException
* @throws JobSecurityException
*/
public Properties getParameters(long executionId)
throws NoSuchJobExecutionException, JobSecurityException;
/**
* Creates a new job instance and starts the first execution of that
* instance.
*
* Note the Job XML describing the job is first searched for by name
* according to a means prescribed by the batch runtime implementation.
* This may vary by implementation. If the Job XML is not found by that
* means, then the batch runtime must search for the specified Job XML
* as a resource from the META-INF/batch-jobs directory based on the
* current class loader. Job XML files under META-INF/batch-jobs
* directory follow a naming convention of "name".xml where "name" is
* the value of the jobXMLName parameter (see below).
*
* @param jobXMLName
* specifies the name of the Job XML describing the job.
* @param jobParameters
* specifies the keyword/value pairs for attribute
* substitution in the Job XML.
* @return executionId of the new job instance.
* @throws JobStartException
* @throws JobSecurityException
*/
public long start(String jobXMLName, Properties jobParameters) throws JobStartException, JobSecurityException;
/**
* Restarts a failed or stopped job instance.
*
* @param executionId
* specifies the execution to to restart. This execution
* must be the most recent execution that ran.
* @param restartParameters
* specifies the keyword/value pairs for attribute
* substitution in the Job XML.
* @return new executionId
* @throws JobExecutionAlreadyCompleteException
* @throws NoSuchJobExecutionException
* @throws JobExecutionNotMostRecentException,
* @throws JobRestartException
* @throws JobSecurityException
*/
public long restart(long executionId, Properties restartParameters)
throws JobExecutionAlreadyCompleteException,
NoSuchJobExecutionException,
JobExecutionNotMostRecentException,
JobRestartException,
JobSecurityException;
/**
* Request a running job execution stops. This
* method notifies the job execution to stop
* and then returns. The job execution normally
* stops and does so asynchronously. Note
* JobOperator cannot guarantee the jobs stops:
* it is possible a badly behaved batch application
* does not relinquish control.
*
* @param executionId
* specifies the job execution to stop.
* The job execution must be running.
* @throws NoSuchJobExecutionException
* @throws JobExecutionNotRunningException
* @throws JobSecurityException
*/
public void stop(long executionId) throws NoSuchJobExecutionException,
JobExecutionNotRunningException, JobSecurityException;
/**
* Set batch status to ABANDONED. The instance must have
* no running execution.
*
* @param executionId
* specifies the job execution to abandon.
* @throws NoSuchJobExecutionException
* @throws JobExecutionIsRunningException
* @throws JobSecurityException
*/
public void abandon(long executionId) throws
NoSuchJobExecutionException,
JobExecutionIsRunningException, JobSecurityException;
/**
* Return the job instance for the specified execution id.
*
* @param executionId
* specifies the job execution.
* @return job instance
* @throws NoSuchJobExecutionException
* @throws JobSecurityException
*/
public JobInstance getJobInstance(long executionId) throws NoSuchJobExecutionException, JobSecurityException;
/**
* Return all job executions belonging to the specified job instance.
*
* @param jobInstance
* specifies the job instance.
* @return list of job executions
* @throws NoSuchJobInstanceException
* @throws JobSecurityException
*/
public List getJobExecutions(JobInstance instance) throws NoSuchJobInstanceException, JobSecurityException;
/**
* Return job execution for specified execution id
*
* @param executionId
* specifies the job execution.
* @return job execution
* @throws NoSuchJobExecutionException
* @throws JobSecurityException
*/
public JobExecution getJobExecution(long executionId) throws NoSuchJobExecutionException, JobSecurityException;
/**
* Return StepExecutions for specified execution id.
*
* @param executionId
* specifies the job execution.
* @return a list of step executions (no particular ordering implied)
* @throws NoSuchJobExecutionException
* @throws JobSecurityException
*/
public List> getStepExecutions(long jobExecutionId) throws NoSuchJobExecutionException, JobSecurityException;
}
